Meteorologists and climatologists use a different system. To make record-keeping easier and to align better with the actual transition in weather patterns, they divide the year into four equal three-month periods.
While the specific "feel" of the season varies by geography, the calendar designation of the fall months remains consistent within the Northern and Southern Hemispheres. which are the fall months
Peak autumn. This is the month of harvest festivals, Halloween, and the most dramatic foliage. In many regions, this is when the air turns truly crisp. Meteorologists and climatologists use a different system